c0046eacc19a914dddd383769376bcb24b0596705d3fb5bd97cc6d2b70f39da3

Analysis

max time kernel
149s
max time network
154s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
12/02/2024, 10:28

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General

Target

2024-02-12_ef9d94c5994fd403b5df091e2bffde0f_cryptolocker.exe
Size

116KB
MD5

ef9d94c5994fd403b5df091e2bffde0f
SHA1

5a068d0f62746d15bcdb3e1aa74472cf78cedbf6
SHA256

c0046eacc19a914dddd383769376bcb24b0596705d3fb5bd97cc6d2b70f39da3
SHA512

3cedb17db2575c2e223dd7b170f0e8ea8a824f611675075d51f99b7b09bfb05d387d22332a7b6c4189515f4ff37470a49fbbb7628f9b1e7e511cadef05c556c3
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp01q:z6a+CdOOtEvwDpjczc

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2876-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2876-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x0008000000012248-11.dat	CryptoLocker_rule2
behavioral1/memory/2676-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2676-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2876-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2876-14-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x0008000000012248-11.dat	CryptoLocker_set1
behavioral1/memory/2676-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2676-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2876-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2876-14-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x0008000000012248-11.dat	UPX
behavioral1/memory/2676-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2676-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2676	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2876	2024-02-12_ef9d94c5994fd403b5df091e2bffde0f_cryptolocker.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2876-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2876-14-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x0008000000012248-11.dat	upx
behavioral1/memory/2676-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2676-26-0x0000000000500000-0x0000000000510000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2876 wrote to memory of 2676	2876	2024-02-12_ef9d94c5994fd403b5df091e2bffde0f_cryptolocker.exe	28
PID 2876 wrote to memory of 2676	2876	2024-02-12_ef9d94c5994fd403b5df091e2bffde0f_cryptolocker.exe	28
PID 2876 wrote to memory of 2676	2876	2024-02-12_ef9d94c5994fd403b5df091e2bffde0f_cryptolocker.exe	28
PID 2876 wrote to memory of 2676	2876	2024-02-12_ef9d94c5994fd403b5df091e2bffde0f_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-12_ef9d94c5994fd403b5df091e2bffde0f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_ef9d94c5994fd403b5df091e2bffde0f_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2876
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2676

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
116KB

MD5
30ae50eb691b0cd944b56299e98845cd

SHA1
4a565b8184bfe8087f8b2c340c27561ad968f2bf

SHA256
87a722fc2fbdc969fb72781893e1d1d8ca85b5ed1acfb9ad05745e8502d4e1a8

SHA512
5dfbf9de3d2e0beca1e720ef226978bc175cc5a8e1a0af1eb806ff99f2f2efd4fc846b1d173fb5cb496d1948c3f373f77ac1557c4a89edca75f46f967b3ddd19

Download Submit
memory/2676-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2676-18-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2676-20-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2676-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2876-1-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download
memory/2876-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2876-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2876-3-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download
memory/2876-14-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download